| Bieruń-Lędziny County | |
| Native Name: | Powiat bieruńsko-lędziński |
| Settlement Type: | County |
| Total Type: | Total |
| Subdivision Type: | Country |
| Subdivision Type1: | Voivodeship |
| Subdivision Name1: | Silesian |
| Area Total Km2: | 156.68 |
| Population As Of: | 2019-06-30[1] |
| Population Total: | 59715 |
| Population Density Km2: | auto |
| Population Urban: | 45490 |
| Population Blank1 Title: | Rural |
| Population Blank1: | 14225 |
| Coor Pinpoint: | Bieruń |
| Coordinates: | 50.1333°N 25°W |
| Seat: | Bieruń |
| Parts Type: | Gminas |
| Parts: | Total 5 (incl. 3 urban) |
| P1: | Bieruń |
| P2: | Imielin |
| P3: | Lędziny |
| P4: | Gmina Bojszowy |
| P5: | Gmina Chełm Śląski |
| Blank Name: | Car plates |
| Blank Info: | SBL |
| Website: | http://www.powiatbl.pl |
Bieruń-Lędziny County (Polish: powiat bieruńsko-lędziński) is a unit of territorial administration and local government (powiat) in Silesian Voivodeship, southern Poland. It came into being on January 1, 1999, as a result of the Polish local government reforms passed in 1998. Its administrative seat and largest town is Bieruń, which lies 15km (09miles) south-east of the regional capital Katowice. The county also contains the towns of Lędziny, lying 20NaN0 south-east of Bieruń, and Imielin, 70NaN0 east of Bieruń.
Before 2002 the county had its seat in the city of Tychy (outside the county), and was called Tychy County (powiat tyski).
The county covers an area of 156.68km2. As of 2019 its total population is 59,715, out of which the population of Bieruń is 19,539, that of Lędziny is 16,776, that of Imielin is 9,175, and the rural population is 14,225.
Bieruń-Lędziny County is bordered by the cities of Mysłowice and Jaworzno to the north, Oświęcim County to the east, Pszczyna County to the south, and the cities of Tychy and Katowice to the west.
The county is subdivided into five gminas (three urban and two rural). These are listed in the following table, in descending order of population.
| Gmina | Type | Area (km2) | Population (2019) | Seat |
| Bieruń | urban | 40.3 | 19,539 | |
| Lędziny | urban | 32.0 | 16,776 | |
| Imielin | urban | 28.0 | 9,175 | |
| Gmina Bojszowy | rural | 34.1 | 7,899 | Bojszowy |
| Gmina Chełm Śląski | rural | 23.2 | 6,326 | Chełm Śląski |